microldstop.hh revision 7620
1/* 2 * Copyright (c) 2007 The Hewlett-Packard Development Company 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Gabe Black 38 */ 39 40#ifndef __ARCH_X86_INSTS_MICROLDSTOP_HH__ 41#define __ARCH_X86_INSTS_MICROLDSTOP_HH__ 42 43#include "arch/x86/insts/microop.hh" 44#include "mem/packet.hh" 45#include "mem/request.hh" 46 47namespace X86ISA 48{ 49 const Request::FlagsType SegmentFlagMask = mask(4); 50 const int FlagShift = 4; 51 enum FlagBit { 52 CPL0FlagBit = 1, 53 AddrSizeFlagBit = 2, 54 StoreCheck = 4 55 }; 56 57 /** 58 * Base class for load and store ops 59 */ 60 class LdStOp : public X86MicroopBase 61 { 62 protected: 63 const uint8_t scale; 64 const RegIndex index; 65 const RegIndex base; 66 const uint64_t disp; 67 const uint8_t segment; 68 const RegIndex data; 69 const uint8_t dataSize; 70 const uint8_t addressSize; 71 const Request::FlagsType memFlags; 72 RegIndex foldOBit, foldABit; 73 74 //Constructor 75 LdStOp(ExtMachInst _machInst, 76 const char * mnem, const char * _instMnem, 77 uint64_t setFlags, 78 uint8_t _scale, InstRegIndex _index, InstRegIndex _base, 79 uint64_t _disp, InstRegIndex _segment, 80 InstRegIndex _data, 81 uint8_t _dataSize, uint8_t _addressSize, 82 Request::FlagsType _memFlags, 83 OpClass __opClass) : 84 X86MicroopBase(machInst, mnem, _instMnem, setFlags, __opClass), 85 scale(_scale), index(_index.idx), base(_base.idx), 86 disp(_disp), segment(_segment.idx), 87 data(_data.idx), 88 dataSize(_dataSize), addressSize(_addressSize), 89 memFlags(_memFlags | _segment.idx) 90 { 91 assert(_segment.idx < NUM_SEGMENTREGS); 92 foldOBit = (dataSize == 1 && !_machInst.rex.present) ? 1 << 6 : 0; 93 foldABit = 94 (addressSize == 1 && !_machInst.rex.present) ? 1 << 6 : 0; 95 } 96 97 std::string generateDisassembly(Addr pc, 98 const SymbolTable *symtab) const; 99 100 template<class Context, class MemType> 101 Fault read(Context *xc, Addr EA, MemType & Mem, unsigned flags) const 102 { 103 Fault fault = NoFault; 104 switch(dataSize) 105 { 106 case 1: 107 fault = xc->read(EA, (uint8_t&)Mem, flags); 108 break; 109 case 2: 110 fault = xc->read(EA, (uint16_t&)Mem, flags); 111 break; 112 case 4: 113 fault = xc->read(EA, (uint32_t&)Mem, flags); 114 break; 115 case 8: 116 fault = xc->read(EA, (uint64_t&)Mem, flags); 117 break; 118 default: 119 panic("Bad operand size %d for read at %#x.\n", dataSize, EA); 120 } 121 return fault; 122 } 123 124 template<class Context, class MemType> 125 Fault write(Context *xc, MemType & Mem, Addr EA, unsigned flags) const 126 { 127 Fault fault = NoFault; 128 switch(dataSize) 129 { 130 case 1: 131 fault = xc->write((uint8_t&)Mem, EA, flags, 0); 132 break; 133 case 2: 134 fault = xc->write((uint16_t&)Mem, EA, flags, 0); 135 break; 136 case 4: 137 fault = xc->write((uint32_t&)Mem, EA, flags, 0); 138 break; 139 case 8: 140 fault = xc->write((uint64_t&)Mem, EA, flags, 0); 141 break; 142 default: 143 panic("Bad operand size %d for write at %#x.\n", dataSize, EA); 144 } 145 return fault; 146 } 147 148 uint64_t 149 get(PacketPtr pkt) const 150 { 151 switch(dataSize) 152 { 153 case 1: 154 return pkt->get<uint8_t>(); 155 case 2: 156 return pkt->get<uint16_t>(); 157 case 4: 158 return pkt->get<uint32_t>(); 159 case 8: 160 return pkt->get<uint64_t>(); 161 default: 162 panic("Bad operand size %d for read at %#x.\n", 163 dataSize, pkt->getAddr()); 164 } 165 } 166 }; 167} 168 169#endif //__ARCH_X86_INSTS_MICROLDSTOP_HH__ 170